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How to remove or modify Confluence X-Frame-Options response header?

Hi,

my current Confluence 5.8.15 / TomCat 8 instance seems to add a "X-Frame-Options: SAMEORIGIN" header to all responses. How can I disable or modify this behavior? (please no security discussion wink)

2 answers

Hi,

behavior seems to be related with the option:

antiClickJackingEnabled c.f. https://tomcat.apache.org/tomcat-8.0-doc/config/filter.html

Because I didn't want to change the default configuration, I rewrote my plugin to use JSONP instead of been loaded within an iframe.

Same issue over here! Since we upgraded to Confluence 5.8.16 we experience an issue that all iFrame integrations do not work anymore. Additionally, we had multiple issues with the new sameorigin policy since we use a Tivoli Access Manager in front of our Tomcat.

Jens, just saw on https://jira.atlassian.com/browse/CONF-29230 and from the source in SecurityHeadersInterceptor.java that -Dconfluence.clickjacking.protection.disable=true might help. Please try that, i haven't checked it yet

We had this setting enabled on Confluence 5.8.16 which worked fine. Now, on Confluence 5.8.18 it does not work anymore. I could not find any information on this on the release notes of Confluence, which is very bad :(

We are also experiencing this issue since upgrading Confluence to 5.8.18 and need to find a way for at least one space within our Confluence instance to be able to be viewed through an iframe.  Have either of you had any more luck with this?

Hi Carol!

While we were able to resolve this on Conf 5.8.16 by adding a parameter to JAVA_OPTS on setenv.sh, we had to add this to CATALINA_OPTS on Conf 5.8.18. See:

#Click jacking protection disable
CATALINA_OPTS="${CATALINA_OPTS} -Dconfluence.clickjacking.protection.disable=true"

So, if you add this to setenv.sh, iframes will work again!

Thanks for your quick reply, extremely appreciated!  This pointed me in exactly the direction I needed!

In case others need this, here's what I had to do since we are running on Windows using a Windows Service.

Open setting properties for Windows Services via Command Line (an example of how to do this is listed within the link below – remember we are now using tomcat8 instead of 7 when entering the command):

https://confluence.atlassian.com/jira/setting-properties-and-options-on-startup-120007.html#SettingPropertiesandOptionsonStartup-SettingPropertiesforWindowsServicesviaCommandLine

Within the Java Options, add the below line:

-Dconfluence.clickjacking.protection.disable=true

An alternate (to Java Options), if you have a web server in front of Tomcat, you can remove these two headers. e.g. in Apache/mod_headers/mod_jk kind of setup to connect Apache to Tomcat add following

<VirtualHost *:80>
        ServerName yourconfluence.yourdomain.com
        JkMount /* wconfl
        Header unset X-Frame-Options
        Header unset Content-Security-Policy
</VirtualHost>

Header unset should work in other places as well in apache config file, I guess.

 

Hi Ajay,
can you please explain what exactly the line “JkMount /* wconfl” is doing?
So far as I know “wconfl” is a worker for tomcat, right?
How is the file “workers.properties” defined, then?
Thanks loxlay

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